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octane

oc·tane [ ók tàyn ] (plural oc·tanes)


noun 
Definition:
 
1. petroleum component: a liquid hydrocarbon found in petroleum that exists in 18 structurally different forms. C8H18

2. automotive 
Same as  octane number


[Late 19th century. <octo-; from the number of carbon atoms in the hydrocarbon]
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